Google Onebox Examples?

Google has launched its music search service called 'OneBox', which allows you to listen to songs straight from search results. But as is often the case, UK can't use it because currently the service is US only.
I want to try the service, I search google for a music track and I don't get the Onebox result.
Can I see some examples of how the service works?

Well you'll be able to see Onebox results soon. Google will make them available worlwide.
On top of the organic results (and sometimes at the bottom), Google shows OneBox results for queries that can be answered instantly or when a direct link can be offered.

Users who search for an artist, song title, album title or even lyrics from the song will be given a sample of the music in a pop-up box that will play at least a 30-second segment - in some cases the entire song. There will also be an option to then buy the track.

Examples: